# Trigonometry/Angles/Quiz

1 Which formula gives the measure of an angle in radians?

 ${\displaystyle s=r\theta }$ ${\displaystyle \theta ={\frac {s}{r}}}$ ${\displaystyle r={\frac {s}{\theta }}}$ ${\displaystyle s=\pi r}$

2 Complete the sentence:

 An angle is made of two with a common in a single .

3 Which formula gives the arc length of an angle?

 ${\displaystyle s=r\theta }$ ${\displaystyle \theta ={\frac {s}{r}}}$ ${\displaystyle r={\frac {s}{\theta }}}$ ${\displaystyle s=\pi r}$

4 Fill in the blanks:

 Angles consist of an and a ray, and an angle .

5 Which formula gives the length of a radius of an angle?

 ${\displaystyle s=r\theta }$ ${\displaystyle \theta ={\frac {s}{r}}}$ ${\displaystyle r={\frac {s}{\theta }}}$ ${\displaystyle s=\pi r}$

6 What is the arclength of a 45 degree angle with radius 3?

7 The value of θ in an angle is independent of the size of the arc length since the radius is proportional in [itex]\theta=\frac{s}{r}.

 TRUE. FALSE.

8 What is the measure of an angle with arclength 6 and radius 8?

9 What is the radius of a 60 degree angle with arclength 10?

10 Angles are considered dimensionless, since they are defined as the ratio of lengths.

 TRUE. FALSE.